Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e80a1afe823d6f…

MALICIOUS

PDF

90.9 KB Created: 2021-03-15 17:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7615cb0eeb6f05f2831c3fa3c8bf7ca3 SHA-1: 36305de82cba7de52324674ec1460baa802cf034 SHA-256: 26e80a1afe823d6f8bd52ab3f46d57b64982b040983e006743085e656e5053b7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, many pointing to disposable hosting, indicating a link farm. One of the primary URLs extracted is https://dugedepap.ru/wix?keyword=tau+battlesuit+commander, which is likely part of a phishing or SEO spam campaign. No scripts were extracted, but the PDF structure and heuristics suggest it's designed to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/wix?keyword=tau+battlesuit+commander PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492294/normal_6026211c4a6c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449777/normal_60367fe42f553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_603d30991c5e7.pdfIn PDF document text
    • https://mopotiwifatuge.weebly.com/uploads/1/3/0/8/130813373/4af25e38bec.pdfIn PDF document text
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/zamalexajiwigi_pikokobexemig_miwukazivat_tifularuginibew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455659/normal_5fe0d47ac85c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474445/normal_601521dbc652c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_600f10a5e8e2f.pdfIn PDF document text
    • https://ludasajuwo.weebly.com/uploads/1/3/4/0/134096591/88636.pdfIn PDF document text
    • https://mumovukejepi.weebly.com/uploads/1/3/1/4/131483147/kijalomemof-furugoxofuwigar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rixuzomobe.epizy.com/garment_costing_sheet_in_excel.pdfIn PDF document text
    • http://modanatev.rf.gd/what_is_the_meaning_of_vis--vis.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/how_to_install_homebrew_on_macos_catalina.pdfIn PDF document text
    • http://gekeweluzal.epizy.com/18926289548.pdfIn PDF document text
    • http://mirimanomuropa.rf.gd/32872590758.pdfIn PDF document text
    • http://kefitorexere.rf.gd/american_gods_season_2_episode_1_gods_list.pdfIn PDF document text
    • http://suxanovovogemi.rf.gd/85490649102.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/9186253834.pdfIn PDF document text
    • http://galapor.rf.gd/divinity_original_sin_2_weapon_crafting_guide.pdfIn PDF document text
    • http://podepabat.rf.gd/netoseniferosotakazox.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADA 5056 bytes
SHA-256: 3d94e224a06f55b896e9f03bc099dbfacc08edd7e58a2abe429d001740724ca6
font_01_sfnt_off00012bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDC 10816 bytes
SHA-256: f82c4d55336ea2a9bb21954bce52005031d3fc90077353aa0109486ca6817c7f
font_02_sfnt_off00015034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15034 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378